Question

I need question a and b done pls help

Answer 1

For (a)

3a^2 - 5b + 8

Let a be -2 and b be 3.

3(-2)^2 - 5(3) + 8

3(4) - 15 + 8

12 - 15 + 8

-3 + 8

Answer: 5

For (b)

Let a be -2

Let b be 3

(2/3)b - 5a

(2/3)(3) - 5(-2)

2 + 10

Answer: 12

Did you follow?

Answer 2

A. 5

B. 12

Explanation:

What you do is you substitute -2 into the a and the 3 into the b.

a. 3(-2)^2-5(3)+8 b. 2/3(3)-5(-2)

3(4)-15+8 2-(-10)

12-15+8 12 is your answer.

-3+8

5 is your answer.